The scale challenges of three North Sea carbonate reservoirs are reviewed in this paper. Whilst carbonate reservoirs are not the largest source of hydrocarbon within the North Sea basins they are very significant on a global basis. Three fields are discussed, which cover a wide range of completion types and production methods. This allows all currently used reservoir management options, as they pertain to scale control within carbonate reservoirs, to be discussed. The paper outlines the scale management philosophy used to select scale inhibitor chemicals for these three carbonate reservoirs for inhibition within the reservoir and downhole production tubing. The phenomenon of reservoir stripping and its impact on scale control within carbonate reservoirs is discussed and contrasted with observations made in sandstone reservoirs. The special issues associated with chemical placement and inhibitor retention within carbonate reservoirs are outlined. Field data are presented to show how fluid diversion and retention of chemical systems (phosphonates and polymers) have been used to manage scale in these challenging fields, whilst environmental constraints have forced changes in chemical selection.